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re PR target/42516 ([m68k] Suboptimal halfword swap on coldfire)

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PR target/42516
* config/m68k/m68k.md (rotlsi_16): New insn.

From-SVN: r155527
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Andreas Schwab 2009-12-30 23:03:46 +00:00
parent d3ae6c2aa2
commit 331fc6d84d
2 changed files with 15 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-12-30 Andreas Schwab <schwab@linux-m68k.org>
PR target/42516
* config/m68k/m68k.md (rotlsi_16): New insn.
2009-12-30 Joseph Myers <joseph@codesourcery.com>
PR c/42439

10
gcc/config/m68k/m68k.md
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@ -1,6 +1,6 @@
;;- Machine description for GNU compiler, Motorola 68000 Version
;; Copyright (C) 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001,
;; 2002, 2003, 2004, 2005, 2006, 2007, 2008
;; 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
;; Free Software Foundation, Inc.
;; This file is part of GCC.
@ -5368,6 +5368,14 @@
;; rotate instructions
(define_insn "rotlsi_16"
[(set (match_operand:SI 0 "register_operand" "=d")
(rotate:SI (match_operand:SI 1 "register_operand" "0")
(const_int 16)))]
""
"swap %0"
[(set_attr "type" "shift")])
(define_insn "rotlsi3"
[(set (match_operand:SI 0 "register_operand" "=d")
(rotate:SI (match_operand:SI 1 "register_operand" "0")